Vector Calculus · Hard problem

The attracting force field $\mathbf F = -\dfrac{(x,\, y,\, z)}{(x^2 + y^2 + z^2)^{3/2}}$ acts on a particle that moves along a path avoiding the origin from $(1, 2, 2)$ to $(0, 3, 4)$. Find the work done by $\mathbf F$.